drm/i915: WARN if !HAS_PC8 when enabling/disabling PC8

We already have some checks and shouldn't be reaching these places on
!HAS_PC8 platforms, but add a WARN,  just in case.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 10a803f69360..895759b5569f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6638,6 +6638,8 @@ void hsw_enable_pc8_work(struct work_struct *__work)
         struct drm_device *dev = dev_priv->dev;
         uint32_t val;
 
+        WARN_ON(!HAS_PC8(dev));
+
         if (dev_priv->pc8.enabled)
                 return;
 
@@ -6683,6 +6685,8 @@ static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv)
         if (dev_priv->pc8.disable_count != 1)
                 return;
 
+        WARN_ON(!HAS_PC8(dev));
+
         cancel_delayed_work_sync(&dev_priv->pc8.enable_work);
         if (!dev_priv->pc8.enabled)
                 return;